Anchor



FIG. 1 is a front elevational view of an anchor showing my new design, the rear elevational view being a mirror image of that shown;

FIG. 2 is a right side elevational view thereof, the left side elevational view being a mirror image of that shown;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for an anchor, as shown and described. 